Door latch mechanism



Oct. 11, 1932. G, R, FEUERLElN 1,881,942?

DOOR LATCH MEGHANISM Filed Feb. 4, 1929; 2 Sheets-Sheet 1 INVENjroR Cet. 1l, 1932. G. R. FEUERLEIN DOOR LATCH MECHANISM Filed Feb. 4, 1929 2 Sheets-Sheet 2 INVENTOR G8072 /z/ aerZ ez?? ATTORNEYS Patented Oct. 11, 1932 uNiTED STATES PATENT golr-icE GEORG R. FEUEB/LEIN, OF DETROIT, MICHIGAN, ASSIGNOR TO FERRO'STAMPING AND MFG. COMPANY, OFVDETROIT, MICHIGAN, A CORPORATION F MICHIGAN A DOOR LATCH MECHANISM Application led February 4, 1929. Serial No. 337,450.

Figure 8 is a sectional view taken on the line 8-3 of Figure 1;

Figure 4 is a detail view of the yoke; Figure is a detail view of the link; Figure 6 is a detail view of the case plate; Referring now to the drawings,-1 is a case plate adapted to be secured to the inner side of a door and having a lateral flange 2 at its forward edge adapted to be secured to the free edge of the door, 3 is a reciprocat- "3 ing bolt movable through an opening in the 3 roll back 8 and link 9, while-the rear portion lateral flange 2 for engagement with a suitable keeper (not shown) and having a short flat rearwardly extending shank portionv 4 slidable on said case plate, 5 is a rearwardly S3 projecting yoke rigid with the bolt shank 4 and slidable over the case plate, 6 is a stud projecting laterally from the case plate and constituting a guide for the yoke, 7 is a helical spring anchored on the case plate and normally holding the bolt in projected position, 8 is a roll back operable from the outer side of the door for retracting the latch bolt, 'and 9 is a link operable independently of the roll back from the inner side of the door for i9 retracting the latch bolt.

In the present instance the forward portion of the yoke 5 is spaced from the case plate and overlaps and constitutes a cover plate for the helical spring 7 land portions of the of the yoke is offset inwardly with respect to the forward portion and is slidable on the case plate 1. Preferably the forward portion of the yoke is provided with laterally 9 projecting inturned flanges 10, 11, 12, 13

and 14 respectively, while the offset rear portion of the yoke has a longitudinally extending elongated slot 15 that receives the guide stud 6. As shown, the flange 10 constitutes an abutment for the rollv back arm. 16;v the flange 11 constitutes a brace or hacker for the flange 10; the flange 12 constitutes an abutment for an arm 17 of the spring 7, and the flanges 13 and 14 are spaced apart in. vertical alignment and constitute abutments for shoulders 18 and 19 of the link 9. These shoulders 18 and 19 are formed by cutting away opposite edge portions of the link 9 and the reduced portion 20 so formed is received between these flanges. Preferably z.

rearward extension or shoulder 22 of the roll back and with the cooperation of an inwardly extending lateral flange 28 of the case plate prevents rotation of the said roll back from the outer side of the door to retract the bolt.

As shown the flange 23 projects laterally inwardly from the case plate adjacent to the roll back8 so as to guide the link 9 during longitudinal movement thereof and to back and ,constitute an abutment or brace for the link when the reduced forward end portion 21 is engaged with the roll back shoulderf22.

Any suitable means such as a remote control lever 25 may be connected to the link 9 at the rear end thereof to move it longitudinally, while a leaf spring 26 anchored on the case plate 1 frictionally engages the link at the forward end thereof and serves to prevent ac'cidental movement and rattling thereof when in neutral or dogging position and maintain the said link in spaced relation to the case plate so as to insure proper engagement of the shoulders 18 and 19 with the flanges 18 and 14 of the yoke.

In use the roll back 8 and link 9 are independently operable from opposite sides of the door to retract the bolt, for example, when the link 9 is moved rearwardly from normal neutral position the shoulders 18 and 19 thereof will, through engagement with the flanges 13 and 14 of the yoke, cause the bolt to be retracted. Likewise when the roll back is rotated in a clockwise direction the arm thereof will through engagement with the flange 10 cause the bolt to be retracted. The link 9 operable from the inner side of the door may also be moved forwardly so that the reduced portion 21 will engage the shoulder 22 o-f .the roll back to prevent the latter from being operated from the outer side of the door. Any suitable means such as the shank of a handle (not shown) may be received in the hub of the roll back to actuate the latter;v

Likewise any suitable means such as the shank of a handle (not shown) may be received in the hub of the lever 25 to actuate the said lever and link 9. v Y

Thus from the foregoing description it will be apparent that the remote control link 9 is adapted to have direct engagement with the yoke 5 to effect Vthe retraction of the latch bolt and also a direct engagement with the roll back 8 to render the roll backino-perative. Thus, intermediate links and parts l ere'tofore used in such constructions have been dispensed with entirely and a material saving in the cost of manufacturing such devices has'been accomplished. It will also be apparent that the forward portion of the yoke 5 serves a dual function, i. e., a bolt shank extension and a cover plate for parts on thecase plate. It is a sheet metal stamping, hence may be readily and raccurately formed. lVforeover the construction and arrangement of the yoke flanges and the construction of the link 9 and its arrangement with respect to the yoke are such that parts such as intermediate links,

separate cover plates, etc., heretofore used in such constructions have been dispensed with entirely. Hence, the cost ofmanufacturing latch constructions has been materially reduced. It will also be noted that theA case plate 1 has an opening 30 adjacent to thev rollback 8 to permit the forward end portion of the link 9 to clear the flanges 13 and 14 of the yoke when the link is assembled with or removed from the latch mechanism on the case plate. Thus the link may be easily and quickly assembled or removed.

While it is believed that from the foregoing description the nature and advantages of the invention will be readily apparent, I desire to have it understood'that lI do not limit myself to what is herein shown' and described and that such changes may bev resorted to when desired as 4fcll within the scope of what is claimed. v

What I claim Aas my invention is:

1.V In a latch mechanism, a latch bolt, and a part connected thereto and having a plurality of fianges, two of said flanges constituting abutments for independently operable bolt retracting members, and another Iof said flanges constituting a'backer or brace A for one of the flanges aforesaid.V

2. In a latch mechanism, the combination taining the bolt in projected position, of

retractingfmeans for lthe bolt includingV a rollback and a link, and a yoke connected to the bolt and having a port-ion spaced from the case plate and constituting a cover plate for portions of the spring and link and having another portion offset relative to the first mentioned portion and slidable on said case plate. Y

4l. In a` door latch, a latch bolt, a yoke connected to the bolt and having a pair of spaced laterally projecting flanges, and means for retracting the bolt from a point remote to the bolt including a link having a reduced portion extending between the spaced flanges and having an enlarged portion in advance lof the flanges and engageable therewith-to retract the bolt.

5. In a door latch, a latch bolt, a yoke connected to and constituting a Vrearward extension of said bolt and having lateral flanges at spaced points longitudinally thereof, and means for retracting said bolt including a rollback engageable with one ofV said flanges, and having a shoulder, and a link constituting a rearward extension of the yoke Yportion movable between said flanges, the

.upright portion of the L being engageable with one of said flanges to retract the bolt, and the base of the L being engageable with the shoulder of the rollback to dog the latter.

6. In a door latch, a latch bolt, a yoke connectedv to said bolt and having two portions disposed at substantially right angles to each other, one of said portions being in alignment with and constituting a rearward eX- tension of the bolt, the other of said portions being provided at its forward and rear edges with lateral flanges, and means for retracting the bolt including a rollback engageable with one of said flanges and having a shoulder, and a link operable from a point remote to the yoke and having a substantially L-shaped portion movable between said flanges, the upright portion of the L being engageable with one of said flanges to re-V disposed at substantially right angles to each other, one of said portions being in alignment with and constituting a rearward eX- tension of the bolt, the other of said portions being provided at its forward and rear edges with lateral flanges, and means for retracting the bolt including a rollback engageable with one of said flanges and having a shoulder, and a link operable from a point remote to the yoke and having a part between said flanges and engageable with one of them, said part being also engageable with the shoulder of the rollback to dog the latter.

8. In a door latch mechanism, a latch bolt, and a yoke connected to the bolt and having two portions disposed at substantially right angles to each other, one of said portions being in alignment with and constituting a rearward extension of said bolt, and the other of said portions being provided at the forward and rear edges thereof with lateral flanges adapted to be engaged by independent operable bolt retracting members. 9. In a door latch mechanism, a latch bolt, and a yoke connected to the bolt and having two portions extending in different directions; one of said portions being in alignment with and constituting a rearward eX- tension of the bolt, and means for retracting '39 the bolt including a rollback engageable with the second portion, and a remote control link engageable with and constituting a rearward extension of the second portion.

10. In a door latch mechanism, a latch bolt, a rollback at one side of the latch bolt and having a shoulder, a remote control link in rear of the rollback and having a shoulder, and means operable by said rollback and remote control link to effect a retraction of "79 the bolt, including a yoke connected to the bolt and having portions at spaced points thereof engageable by said rollback and the shoulder of said link, a portion of the link being engageable with the shoulder of theJ rollback to render the latter inoperative.

In testimony whereof I affix my signature.

GEORG R. FEUERLEIN. 

